Be(OH)2 → Be2+ + 2OH−
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- Electrolytic dissociation of beryllium hydroxide
Electrolytic dissociation of beryllium hydroxide yields beryllium ion and hydroxide ion (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Electrolytic dissociation of beryllium hydroxide
General equation
- Electrolytic dissociation of hydroxide base
- Hydroxide baseBrønsted base ⟶ CationConjugate acid + OH−
Oxidation state of each atom
- Electrolytic dissociation of beryllium hydroxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Be(OH)2 | Beryllium hydroxide | 1 | Brønsted base | Hydroxide base |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Be2+ | Beryllium ion | 1 | Conjugate acid | Cation |
| OH− | Hydroxide ion | 2 | – | Hydroxide ion |
Thermodynamic changes
Changes in standard condition
- Electrolytic dissociation of beryllium hydroxide◆
ΔrG 120.8 kJ/mol K 0.69 × 10−21 pK 21.16
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | 59.7 | 120.8 | −203.1 | – |
per 1 mol of | 59.7 | 120.8 | −203.1 | – |
per 1 mol of Beryllium ion | 59.7 | 120.8 | −203.1 | – |
per 1 mol of Hydroxide ion | 29.9 | 60.40 | −101.5 | – |
Thermodynamic data of reactants
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| Be(OH)2 (cr) α | -902.5[1] | -815.0[1] | 51.9[1] | – |
| Be(OH)2 (cr) β | -905.8[1] | -817.5[1] | 50[1] | – |
| Be(OH)2 (am) freshly precipitated | -897.9[1] | – | – | – |
| Be(OH)2 (g) | -661[1] | – | – | – |
| Be(OH)2 (am) 0.75 hydrate | -1116.7[1] | – | – | – |
* (cr):Crystalline solid, (am):Amorphous solid, (g):Gas
Thermodynamic data of products
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| Be2+ (g) | 2993.23[1] | – | – | – |
| Be2+ (ao) | -382.8[1] | -379.73[1] | -129.7[1] | – |
| OH− (g) | -143.5[1] | – | – | – |
| OH− (ao) | -229.994[1] | -157.244[1] | -10.75[1] | -148.5[1] |
* (g):Gas, (ao):Un-ionized aqueous solution
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- ^ ΔfH°, -902.5 kJ · mol−1
- ^ ΔfG°, -815.0 kJ · mol−1
- ^ S°, 51.9 J · K−1 · mol−1
- ^ ΔfH°, -905.8 kJ · mol−1
- ^ ΔfG°, -817.5 kJ · mol−1
- ^ S°, 50. J · K−1 · mol−1
- ^ ΔfH°, -897.9 kJ · mol−1
- ^ ΔfH°, -661. kJ · mol−1
- ^ ΔfH°, -1116.7 kJ · mol−1
- ^ ΔfH°, 2993.23 kJ · mol−1
- ^ ΔfH°, -382.8 kJ · mol−1
- ^ ΔfG°, -379.73 kJ · mol−1
- ^ S°, -129.7 J · K−1 · mol−1
- ^ ΔfH°, -143.5 kJ · mol−1
- ^ ΔfH°, -229.994 kJ · mol−1
- ^ ΔfG°, -157.244 kJ · mol−1
- ^ S°, -10.75 J · K−1 · mol−1
- ^ Cp°, -148.5 J · K−1 · mol−1